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Finding the Fourth Proportional to 396.48, 594.72 and 214.20

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Solution

The fourth proportional to 396.48, 594.72 and 214.20 is: 321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.48 : 594.72 = 214.20 : x
  2. Step 2: Convert to fraction form
    396.48/594.72 = 214.20/x
  3. Step 3: Cross multiply
    396.48x = 594.72 × 214.20
  4. Step 4: Simplify right side
    396.48x = 127,389.02
  5. Step 5: Solve for x
    x = 127,389.02/396.48
  6. Step 6: Final answer
    x = 321.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.